All the lounges are "under construction" except the Centurion/Escape lounge is open. The existing BA lounge that has signage that refers you to Admirals Club. I find it hard to believe they will be able to fit more than the Centurion and BA Lounge upstairs so I would expect a co brand Centurion/Escape lounge and BA lounge...Unless something special is coming that is not official. The reason this could be possible is the BA lounge was run with contract workers so who knows what will happen.